Lightweight Non-Locking Sprl Fuel Cap With Threaded Flange

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Part# 05-28666


This cap has secure sealing and easy finger tip operation. These caps are made from the highest quality modern engineering plastics with Viton o ring seals (which can be easily replaced if you should ever need to do so.) The mounting ring is anodized aluminum with the flange recessed to give a perfect flush fit whether it is riveted under a metal skin, as in the RV series, or built into a composite structure. This cap is non vented and recommended to keep the fuel in, the water out and in the locking version, other unwanted items out of your tank. Size: 70 mm O.D.; Wt: 80 grams. SPRL caps are used on Europa, Compair, Glasair, Lancair, Murphy, OMF, Rocket, Velocity, Zenith and many more experimental aircraft. Manufactured by SPRL.

Thread: 2-5/16" UNF
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Very high quality. Skin will be cut larger to accommodate the size of the flange. Fits nice and flush. Had to make a “wrench” ( piece of plate that fits inside the filler neck), to tighten it up, which worked well. I would buy them again. Glastar

Greg M
September 16, 2020


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Is the threaded neck on the SPRL-SH available separately?

Yes, it is available separately. Please use our part number 05-11451. You can type that part number directly into the search bar on our site to find it and add it to your cart.

Q: What is the diameter of just the cap itself, ie. not including the flange?

The diameter of just the cap and not the flange is 2-1/2".

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